Mechanical stoker.



No. 848,628. PA-TENTED APR. 2, 1907. F. J. GROLIUS. l MECHANICAL STOKLR.v

APPLIGATION FILED MAY 21, 190s.

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Specification of Lettersl Patent.

Patented Apii 2,1907.

Application filed May 21', 1903. Serial No. 158,090.

To all whom t Tri/.ay concern:y

Be it known that I, FREDERICK JnoLrUs,

Mechanical Stoker, oi which the following is a full, clear, and exact description, reference being had to the accom anying drawings, forming part of this speci cation, in-which Figure 1 is a perspective sectional view showing a furnace provided with my invention. Fig. 2 is a longitudinal section thereof. Figs. 3 and 4- show in detail the grate-sections b b. Figs. 5 and 6 show the sections c c, and Figs. 7 and 8 show the sections d d.'

My invention relates to an improvement in mechanical stokers for feedin the `rires of boiler-furnaces and the like; an its pur ose is to provide means whereby the 'fire wi l be fed and re ulated more eiiiciently than here tofore an whereby the mechanism will be rendered more durable and easy to maintain and re air.

AAs s own-in the drawings, the 'grate-surface is inclined and is composed of a series of grates b c d e, Ieach composed of sections .de-

tachably 'mounted on Itransverse. agitating- 'bars 2 2, which are pivoted by trunnlons 3 1n side frames 4- and are rocked b a connecting bar or link 5, pivotall yattac ed to arms 6 on the bars 2. The lin y 5 is connected to the yoke 7 of an eccentric 8, which is driven by a suitable shaft 9 and which thus reciprocates the 'link andcauses the bars 2 2 to oscillate on` their trunnions, and thus to rock the ate-sections which they carry. The side ames 4 are inclined, so as to present an in-l clined grate-surface. The grates b` b at the lower portion of the, gratefsurface are provided at their lower portionswith vertical slots 10, by which they are setldetachably on the bars 2, and they have lateral projections at the margins of the slots, which serve to s ace the bars laterally Jfrom each other, and

l when the coal reac At us to aiord intermediate spaces for the ad' mission of air to the ire. hese spaces do ingof the coal, because es the lower portion of the ate it has been coked together sufficienly to prevent its dropping through the crevices. The up er grates c c, where the coal is yet uncoked are likewise composed of sections having vertical slots on their under side, by which they are set on the bars 2; but instead of a'ordingthe air-spaces by separating the sections laterally they are provided with horizontal or inclined wings 1 1 11, which not permit the drop free admission 'to the air. The grates d d at the top of the grate on which the coal is first delivered are preferablyneither slotted nor provided with wings 11 ,but it closely side by side', so'as to afford an unbroken surfacev for the coal. They are provided at their upper margins with a flange 12, which serves to receive and deliverthe coal Jfrom the deadplate as the grate is rocked.

At the base of the grate is a shaking and dumping mechanism composed of sections e, set on the rocking bar2, as above described, but extending outwardly on both sides of the bar to a eater distance than the other sections. T e rocking bar 2, on which thesel sections e are mounted, is not connected with the link 5, but with an independent rod 13, adapted, preferably, to be operated by hand. When the sections e are tipped byfmoving this rod sufficiently far in either direction, the ire may be dumped, or by shaking it to a more limited extent in both directions the clinkers can be removed from the yOrate wth` out dumping the fire, and this operation of the grates affords material advanta es. v

In t `e operation of my device coal is fed from ahop er to the upper portion of the grate, and t e eccentric 8 is started into action by means of a motor. It reciprocates" the rod 5 and rocks the grates,.and as they ally and keep itin a state of agitation, thus producing t e best possible conditions for thorough combustion.

a ed or burned, it may be removed and rep aced readily without interfering with the other sections, so that the repairm of any section involves onl the replacing o the section .itself and not t e replacing of the entire rate.

Within the scope of my invention as defined in the claims I may make many changes in the form and construction of the parts,

since What l claim is- 1. An inclined grate having -a series of transverse, rocking grate-bars, the upper grate-bar being substantially imperforate, the intermediate grate-bars being provided vwith substantially horizontal air-spaces, and the lower grate-b ars being provided with vertical air-spaces; substantially as described.

2. An inclined grate having a series of ipacility for are rocked they feed the coal forward gradu- Ifany, section of thegrates should be' daml prevent the' dischargeof the coal, but afford 'I Das IIO

A tional bars havin@r l transverse rocking bars, the upper bars in yspaces between said wings, the intermediate grate-bars of saidseries `being provided with substantially horizontal air-spaces7 and the lower grate-bars of the series being provided with substantially vertical air-spaces; substantially as described.

3. An inclined grate having a series of transverse rocking bars, each provided with detachable sections, the uppermost sectional bar being substantially imperforate, the intermediate sectional bars having substantially horizontal air-spacesI and the lower secg vertical air-spaces; substantially as described.

4. A'n inclined grate having'la seriesof transverse rocking bars, the uppermost bar being substantially imperforate7 the intermediate bars being formed to admit air to .and

prevent the dropping of the fuel, the lower bars having vertical air-spaces, in combination with a dumping-grate, atl the bottom of the inclined grate-surface; substantially as described. l

, 5. A grate comprising an inclined series of transverse rocking bars, having detachable sections held on said bars by gravity only, the uppermost sections forinin a substantially im erforate surface, the lntermediate sections having inclined wings arranged to prevent the dropping of the fuel and airspaces between said wings, and the lower sections havin vertical air-spaces; substantially as descrilgued.

In testimony whereof I have hereunto set my hand.

F. J. CROLIUS. Witnesses:

THoMAs W. BAKEWELL, H: M. CoRwiN. 

